I also invested in whitecoin and it's gone up a lot in value from 0.018 to $2.68 in peak. This trading remind me of whitecoin before it went much higher. Whitecoin has 742 million supply with max supply of 1 billion but reward is only 10 per block but blocks are fast and about 60 reward when Gulden has 160 in 150s.
The reward is meant to drop in August to 120 and 60 in 2024 or 2025. The developers have to approved the change as it was requested by the community but Rijk looks confident it will be ready for August. The max supply for Gulden is also 750 million, was changed from 1.68 billion two weeks ago.